 const mongoose = require('mongoose');
 // 连接数据库
 mongoose.connect('mongodb://127.0.0.1:27017/0825');
 mongoose.connection.on('open',()=>{
     console.log("连接成功");
 });
 mongoose.connection.on('error',()=>{
     console.log("连接失败");
 })
 module.exports = mongoose;
